package com.lgb.interceptor;

//后台登录的拦截器

import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class LoginInterceptor extends HandlerInterceptorAdapter {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //如果session域里没有user对象
        if(request.getSession().getAttribute("user") == null){
            //重定向到登录页面
            response.sendRedirect("/admin");
            return false;
        }
        return true;
    }
}
